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EP1253438A3 - Procédés et dispositif pour estimer la précision des signaux de mesures de distance - Google Patents

Procédés et dispositif pour estimer la précision des signaux de mesures de distance Download PDF

Info

Publication number
EP1253438A3
EP1253438A3 EP02076633A EP02076633A EP1253438A3 EP 1253438 A3 EP1253438 A3 EP 1253438A3 EP 02076633 A EP02076633 A EP 02076633A EP 02076633 A EP02076633 A EP 02076633A EP 1253438 A3 EP1253438 A3 EP 1253438A3
Authority
EP
European Patent Office
Prior art keywords
range
measurements
measurement
coarse
range measurements
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP02076633A
Other languages
German (de)
English (en)
Other versions
EP1253438A2 (fr
Inventor
Marc J. Martorana
Steven Galgano
Scott C. Martorana
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ITT Manufacturing Enterprises LLC
Original Assignee
ITT Manufacturing Enterprises LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ITT Manufacturing Enterprises LLC filed Critical ITT Manufacturing Enterprises LLC
Publication of EP1253438A2 publication Critical patent/EP1253438A2/fr
Publication of EP1253438A3 publication Critical patent/EP1253438A3/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S5/02—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
    • G01S5/0205—Details
    • G01S5/021—Calibration, monitoring or correction
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S5/02—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
    • G01S5/0273—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves using multipath or indirect path propagation signals in position determination
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S5/02—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
    • G01S5/0294—Trajectory determination or predictive filtering, e.g. target tracking or Kalman filtering
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S5/02—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
    • G01S5/14—Determining absolute distances from a plurality of spaced points of known location

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Position Fixing By Use Of Radio Waves (AREA)
  • Locating Faults (AREA)
  • Mobile Radio Communication Systems (AREA)
EP02076633A 2001-04-23 2002-04-23 Procédés et dispositif pour estimer la précision des signaux de mesures de distance Withdrawn EP1253438A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/839,576 US6486831B1 (en) 2001-04-23 2001-04-23 Methods and apparatus for estimating accuracy of measurement signals
US839576 2001-04-23

Publications (2)

Publication Number Publication Date
EP1253438A2 EP1253438A2 (fr) 2002-10-30
EP1253438A3 true EP1253438A3 (fr) 2003-10-08

Family

ID=25280118

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02076633A Withdrawn EP1253438A3 (fr) 2001-04-23 2002-04-23 Procédés et dispositif pour estimer la précision des signaux de mesures de distance

Country Status (2)

Country Link
US (1) US6486831B1 (fr)
EP (1) EP1253438A3 (fr)

Families Citing this family (79)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9928416D0 (en) * 1999-12-01 2000-01-26 Nokia Networks Oy A telecommunications system
US6771934B2 (en) * 2001-06-19 2004-08-03 Telcordia Technologies, Inc. Methods and systems for reducing interference across coverage cells
US6963727B2 (en) * 2001-07-26 2005-11-08 Time Domain Corporation Direct-path-signal detection apparatus and associated methods
US6728545B1 (en) 2001-11-16 2004-04-27 Meshnetworks, Inc. System and method for computing the location of a mobile terminal in a wireless communications network
WO2003083410A1 (fr) * 2002-03-28 2003-10-09 Honeywell International, Inc. Reseau de commande distribue pour forme de structure de rayonnement electromagnetique flexible (miroir, optique adaptive)
WO2003094435A1 (fr) * 2002-04-30 2003-11-13 Nokia Corporation Procede et dispositif de gestion d'echange de donnees en arborescence
US20040132464A1 (en) * 2002-12-20 2004-07-08 Sami Poykko Location system
US7170447B2 (en) * 2003-02-14 2007-01-30 Qualcomm Incorporated Method and apparatus for processing navigation data in position determination
US8699990B2 (en) 2003-03-11 2014-04-15 Motorola Mobility Llc Location requests and measurement responses in wireless communications networks and methods
KR20050117557A (ko) * 2003-03-13 2005-12-14 메시네트웍스, 인코포레이티드 저속 중앙처리장치를 이용하는 무선 애드-혹 통신네트워크에 있어서 이동 가입자에 대한 위치계산의정확도를 향상시키기 위한 시스템 및 방법
US6856905B2 (en) * 2003-04-29 2005-02-15 Garmin At, Inc. Systems and methods for fault detection and exclusion in navigational systems
US7586982B2 (en) * 2003-05-06 2009-09-08 Nokia Corporation Kalman filter based method and apparatus for linear equalization of CDMA downlink channels
US20040227661A1 (en) * 2003-05-12 2004-11-18 Godsy Robert C. Doppler radar system for measuring range, speed, and relative direction of movement of an object
US7366243B1 (en) 2003-10-29 2008-04-29 Itt Manufacturing Enterprises, Inc. Methods and apparatus for transmitting non-contiguous spread spectrum signals for communications and navigation
US7245923B2 (en) * 2003-11-20 2007-07-17 Intelligent Spatial Technologies Mobile device and geographic information system background and summary of the related art
US8060112B2 (en) * 2003-11-20 2011-11-15 Intellient Spatial Technologies, Inc. Mobile device and geographic information system background and summary of the related art
US20050111405A1 (en) * 2003-11-25 2005-05-26 Emmanuel Kanterakis Interference cancellation method and apparatus
US7362801B2 (en) * 2003-12-18 2008-04-22 Lsi Logic Corporation Method for accurate estimation of noise for data modems
US7110779B2 (en) * 2004-01-29 2006-09-19 Harris Corporation Wireless communications system including a wireless device locator and related methods
DE102004010537B4 (de) * 2004-03-04 2007-04-05 Eads Deutschland Gmbh Verfahren zur Auswertung von Radardaten zum vollautomatischen Erstellen einer Karte gestörter Gebiete
WO2005088853A1 (fr) 2004-03-09 2005-09-22 Neocific Inc. Procedes et dispositif pour acces aleatoire dans des systemes de communication a ondes porteuses multiples
US7383053B2 (en) * 2004-04-28 2008-06-03 Lawrence Livermore National Security, Llc Position estimation of transceivers in communication networks
US7411551B2 (en) * 2004-06-21 2008-08-12 Korea Electrotechnology Research Institute System and method for asynchronous wireless positioning by ordered transmission
US7409220B2 (en) * 2004-08-05 2008-08-05 Meshnetworks, Inc. Autonomous reference system and method for monitoring the location and movement of objects
JP4853993B2 (ja) * 2005-03-11 2012-01-11 独立行政法人情報通信研究機構 測距システム
US8436773B2 (en) * 2005-04-19 2013-05-07 Qualcomm Incorporated Method for leveraging diversity for enhanced location determination
US7418341B2 (en) * 2005-09-12 2008-08-26 Intelligent Spatial Technologies System and method for the selection of a unique geographic feature
US7318206B2 (en) * 2005-09-30 2008-01-08 International Business Machines Corporation Offset determination for measurement system matching
US7764217B2 (en) * 2005-10-13 2010-07-27 Bae Systems Information And Electronic Systems Integration Inc. Surface RF emitter passive ranging accuracy confirmation algorithm
US7489904B2 (en) * 2005-12-13 2009-02-10 Motorola, Inc. Method and system for determining the time of arrival of a direct radio signal
US8538676B2 (en) * 2006-06-30 2013-09-17 IPointer, Inc. Mobile geographic information system and method
US8447472B2 (en) * 2007-01-16 2013-05-21 Ford Global Technologies, Llc Method and system for impact time and velocity prediction
CN101720440B (zh) * 2007-04-12 2013-07-10 Lm爱立信电话有限公司 确定无线终端在通信网络中的位置
AU2009326190B9 (en) * 2008-12-12 2014-07-03 Bae Systems Plc High frequency surfacewave radar
JP5647141B2 (ja) * 2008-12-22 2014-12-24 インテリジェント スペイシャル テクノロジーズ，インク． 関心のあるオブジェクトを指定することにより動作を開始しフィードバックを提供するシステム及び方法
CA2748031A1 (fr) * 2008-12-22 2010-07-01 Intelligent Spatial Technologies, Inc. Systeme et procede pour relier des objets du monde reel et des representations d'objets par pointage
EP2361424A1 (fr) * 2008-12-22 2011-08-31 Intelligent Spatial Technologies, Inc. Système et procédé pour explorer des scènes tridimensionnelles par pointage au niveau d'un objet de référence
US8483519B2 (en) 2008-12-22 2013-07-09 Ipointer Inc. Mobile image search and indexing system and method
CN102714524B (zh) * 2009-11-13 2016-08-03 Zoll医疗公司 基于社区的响应系统及方法
US8775065B2 (en) 2010-04-05 2014-07-08 Qualcomm Incorporated Radio model updating
US20110273278A1 (en) * 2010-05-07 2011-11-10 Tod Edward Kurt System and Method for Transmitting Information
US9031572B2 (en) * 2010-12-22 2015-05-12 Qualcomm Incorporated Method and apparatus for estimating satellite positioning reliability
US8831906B1 (en) * 2011-04-08 2014-09-09 Exelis Inc. Technique for determining closest point of approach
US9057771B2 (en) * 2011-04-25 2015-06-16 Disney Enterprises, Inc. Carrier sense-based ranging
US9432964B2 (en) * 2012-05-21 2016-08-30 Qualcomm Incorporated Method and apparatus for determining locations of access points
US9560619B2 (en) 2012-06-28 2017-01-31 Koninklijke Philips N.V. Method of estimating the position of a device and an apparatus implementing the same
MY175864A (en) * 2012-08-10 2020-07-14 Aviat Networks Inc Systems and methods for phase determination over a wireless link
US9026138B2 (en) * 2013-01-10 2015-05-05 Qualcomm Incorporated Method and/or system for obtaining signatures for use in navigation
US9606848B2 (en) * 2013-03-12 2017-03-28 Raytheon Company Iterative Kalman filtering
US9517417B2 (en) 2013-06-06 2016-12-13 Zih Corp. Method, apparatus, and computer program product for performance analytics determining participant statistical data and game status data
US9985672B2 (en) 2013-06-06 2018-05-29 Zih Corp. Method, apparatus, and computer program product for evaluating performance based on real-time data for proximity and movement of objects
US9715005B2 (en) 2013-06-06 2017-07-25 Zih Corp. Method, apparatus, and computer program product improving real time location systems with multiple location technologies
US11423464B2 (en) 2013-06-06 2022-08-23 Zebra Technologies Corporation Method, apparatus, and computer program product for enhancement of fan experience based on location data
US10437658B2 (en) 2013-06-06 2019-10-08 Zebra Technologies Corporation Method, apparatus, and computer program product for collecting and displaying sporting event data based on real time data for proximity and movement of objects
US9699278B2 (en) 2013-06-06 2017-07-04 Zih Corp. Modular location tag for a real time location system network
US10609762B2 (en) 2013-06-06 2020-03-31 Zebra Technologies Corporation Method, apparatus, and computer program product improving backhaul of sensor and other data to real time location system network
US9313619B2 (en) * 2014-04-24 2016-04-12 At&T Mobility Ii Llc Facilitating estimation of mobile device presence inside a defined region
US9661455B2 (en) 2014-06-05 2017-05-23 Zih Corp. Method, apparatus, and computer program product for real time location system referencing in physically and radio frequency challenged environments
US9668164B2 (en) 2014-06-05 2017-05-30 Zih Corp. Receiver processor for bandwidth management of a multiple receiver real-time location system (RTLS)
US9626616B2 (en) 2014-06-05 2017-04-18 Zih Corp. Low-profile real-time location system tag
WO2015186084A1 (fr) 2014-06-05 2015-12-10 Zih Corp. Procédé de localisation itérative d'une cible dans un système de localisation de cible à multiples récepteurs
GB2541834B (en) * 2014-06-05 2020-12-23 Zebra Tech Corp Receiver processor for adaptive windowing and high-resolution TOA determination in a multiple receiver target location system
US20150375083A1 (en) 2014-06-05 2015-12-31 Zih Corp. Method, Apparatus, And Computer Program Product For Enhancement Of Event Visualizations Based On Location Data
WO2015187991A1 (fr) 2014-06-05 2015-12-10 Zih Corp. Systèmes, appareil et procédés pour des communications à ultra-large bande à fréquence variable
US9759803B2 (en) 2014-06-06 2017-09-12 Zih Corp. Method, apparatus, and computer program product for employing a spatial association model in a real time location system
CN106662632A (zh) 2014-06-06 2017-05-10 Zih公司 改进利用多个位置技术的实时位置系统的方法、装置和计算机程序产品
GB2533798B (en) 2014-12-30 2018-02-28 Gen Electric Method and system for tracking a person in a medical room
US9801019B2 (en) 2015-03-16 2017-10-24 Qualcomm Incorporated Adaptive triggering of RTT ranging for enhanced position accuracy
US10094930B2 (en) * 2015-06-23 2018-10-09 Honeywell International Inc. Global navigation satellite system (GNSS) spoofing detection with carrier phase and inertial sensors
US10421452B2 (en) * 2017-03-06 2019-09-24 GM Global Technology Operations LLC Soft track maintenance
EP3594712B1 (fr) * 2018-07-12 2023-11-22 Cohda Wireless Pty Ltd. Procédé et système d'estimation de distance relative et de position d'objets à l'aide d'un système de communication sans fil
EP3617735B1 (fr) 2018-08-31 2025-10-01 Cohda Wireless Pty Ltd. Procédé d'estimation de la position d'un objet
US20200088883A1 (en) * 2018-09-19 2020-03-19 Here Global B.V. One-dimensional vehicle ranging
CN111372185A (zh) * 2018-12-25 2020-07-03 深圳市优必选科技有限公司 无线定位方法及设备
US20200351814A1 (en) 2019-05-02 2020-11-05 Qualcomm Incorporated Group delay timing accuracy for positioning in new radio
CN110245565A (zh) * 2019-05-14 2019-09-17 东软集团股份有限公司 车辆跟踪方法、装置、计算机可读存储介质及电子设备
WO2021154376A1 (fr) * 2020-01-31 2021-08-05 Qualcomm Incorporated Signalisation d'équipement utilisateur pour prendre en charge une détection de biais
KR102756686B1 (ko) * 2024-06-11 2025-01-21 국방과학연구소 전술데이터링크 시스템의 표적 정보 위치 오차를 최소화하는 메시지 처리 방법 및 이를 수행하는 전술데이터링크 시스템
CN119291707A (zh) * 2024-12-11 2025-01-10 深达威科技(广东)股份有限公司 一种提高激光测距仪测距速度的方法和激光测距仪

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6176837B1 (en) * 1998-04-17 2001-01-23 Massachusetts Institute Of Technology Motion tracking system
US6204812B1 (en) * 1998-10-09 2001-03-20 Cell-Loc Inc. Methods and apparatus to position a mobile receiver using downlink signals, part II

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3975731A (en) * 1974-12-10 1976-08-17 Grumman Aerospace Corporation Airborne positioning system
US4954837A (en) * 1989-07-20 1990-09-04 Harris Corporation Terrain aided passive range estimation
US5883595A (en) * 1997-09-15 1999-03-16 Rockwell International Corporation Method and apparatus for mitigating multipath effects and smoothing groundtracks in a GPS receiver

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6176837B1 (en) * 1998-04-17 2001-01-23 Massachusetts Institute Of Technology Motion tracking system
US6204812B1 (en) * 1998-10-09 2001-03-20 Cell-Loc Inc. Methods and apparatus to position a mobile receiver using downlink signals, part II

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
FISCHER S ET AL: "Time of arrival estimation of narrowband TDMA signals for mobile positioning", PERSONAL, INDOOR AND MOBILE RADIO COMMUNICATIONS, 1998. THE NINTH IEEE INTERNATIONAL SYMPOSIUM ON BOSTON, MA, USA 8-11 SEPT. 1998, NEW YORK, NY, USA,IEEE, US, 8 September 1998 (1998-09-08), pages 451 - 455, XP010314798, ISBN: 0-7803-4872-9 *
THOMAS N J ET AL: "A robust location estimator architecture with biased kalman filtering of TOA data for wireless systems", IEEE SIXTH INTERNATIONAL SYMPOSIUM ON SPREAD SPECTRUM TECHNIQUES, vol. 1, 6 September 2000 (2000-09-06), pages 296 - 300, XP010517571 *

Also Published As

Publication number Publication date
US20020171586A1 (en) 2002-11-21
EP1253438A2 (fr) 2002-10-30
US6486831B1 (en) 2002-11-26

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